1 /*
2  * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 
27 package sun.awt.X11;
28 
29 import java.awt.Component;
30 import java.awt.Graphics;
31 
32 import sun.awt.AWTAccessor;
33 import sun.awt.RepaintArea;
34 
35 /**
36  * The {@code RepaintArea} is a geometric construct created for the
37  * purpose of holding the geometry of several coalesced paint events.
38  * This geometry is accessed synchronously, although it is written such
39  * that painting may still be executed asynchronously.
40  *
41  * @author      Eric Hawkes
42  */
43 final class XRepaintArea extends RepaintArea {
44 
45     /**
46      * Calls {@code Component.update(Graphics)} with given Graphics.
47      */
updateComponent(Component comp, Graphics g)48     protected void updateComponent(Component comp, Graphics g) {
49         if (comp != null) {
50             // We don't call peer.paintPeer() here, because we shouldn't paint
51             // native component when processing UPDATE events.
52             super.updateComponent(comp, g);
53         }
54     }
55 
56     /**
57      * Calls {@code Component.paint(Graphics)} with given Graphics.
58      */
paintComponent(Component comp, Graphics g)59     protected void paintComponent(Component comp, Graphics g) {
60         if (comp != null) {
61             final XComponentPeer peer = AWTAccessor.getComponentAccessor()
62                                                    .getPeer(comp);
63             if (peer != null) {
64                 peer.paintPeer(g);
65             }
66             super.paintComponent(comp, g);
67         }
68     }
69 }
70